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Mentors Workshop Electrical Sub-System Mark McLeod Team 358 Festo/Hauppauge H.S.

Mentors Workshop Electrical Sub-System Mark McLeod Team 358 Festo/Hauppauge H.S. F or I nspiration and R ecognition of S cience and T echnology. Objectives. FIRST Rules & Restrictions Official Suppliers & Other Sources Basics/Components Design Notes Potential Problems

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Mentors Workshop Electrical Sub-System Mark McLeod Team 358 Festo/Hauppauge H.S.

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  1. Mentors WorkshopElectrical Sub-SystemMark McLeodTeam 358Festo/Hauppauge H.S. For Inspiration and Recognition of Science and Technology

  2. Objectives • FIRST Rules & Restrictions • Official Suppliers & Other Sources • Basics/Components • Design Notes • Potential Problems • Keeping Students Busy • Typical Schedule • Sample Layout

  3. FIRST Rules & Restrictions • Kick-off Rules • FIRST Wiring Diagram • Wire gauge • Grounding • Allowable divergence • Part of $3500 limit (2005) on additional parts • No single electronic component > $200 • Inspectors rule – volunteers and all that implies

  4. Official Suppliers & Other Sources • Official Suppliers • www.innovationfirst.com/ • Other Sources • www.jameco.com • www.mouser.com • www.digikey.com • www.future-active.com • www.newarkinone.com • www.radioshack.com

  5. Simplified Circuit Diagram Note: No control system wiring is included 120A Circuit Breaker - + 12V SLA Battery Circuit Breaker Panel Victor 884 Speed Controller Ground Stud Robot Controller Spike Relay Backup Battery Modified Diagram by Steven Shade, Team 1111

  6. Basic Components • Main battery (12v) • Wire gauge – 6, 10, 16 & 24 awg • Spikes (forward/reverse/off) • Victor speed controllers (coast, brake, calibrate) • Motors, fans, compressor • Circuit breakers – 120a main, 20/30/40a panel • Ground stud • Control system (7.2v battery) • Servos, solenoids • 12v sensors -- current, banner • Motors

  7. Design Notes • Diagram robot electrical layout • Access to all components for test and replacement • Control System status lights and buttons visible and accessible • Battery mounted securely and is readily removable • Weight of wire -- short wire runs • Crimp & solder, label all wiring, connections, fuses • Neatness counts – tie-up cable runs (electrical tape for insulation only)

  8. Potential Problems • METAL SHAVINGS (cover electronics) • Blown components • Welding robot frame w/electronics attached • Wiring loose/poor connection (PWM cables too) • Victor Speed Controller calibration • Overheating motors -- additional fan cooling • LockTite melts plastic – controllers, spikes • Breaker resets from stalled or improperly geared motors

  9. Keeping Students Busy • Variations on robot electrical layout • Develop basic skills • Circuit basics, e.g., series & parallel • Advanced circuits, e.g., IR beacon, CMU camera, or external processing circuit • Use of multi-meter • Learn to crimp & solder • Heavy components • Delicate electronics (heat sinks) • PWM and electrical connectors • Debugging techniques • Projects • Battery charging station • FIRST power connectors on battery charger • Test bed

  10. Typical Electronics Schedule • September thru December • Develop basic skills • January thru March • Six week build period • Robot design – space for electronics and wire runs • Motor/sensor requirements • Designing and testing solutions • Resolve physical layout • Integrating solutions with mechanical • Regional event • Inspection

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